Accuracy
Accuracy is an aspect of moves that determine how often they can hit their target. A move's base accuracy currently can be any number from 30% to 100%, usually in multiples of 5.
Many moves have an accuracy of "—%", indicating that they are exempt from accuracy calculations. This is usually because they affect no one but the user (and/or the partner in a Double Battle), or because they will never miss the target (excluding type immunities) unless the target uses a move that grants invulnerability for the turn (such as Protect, or the first stage of Fly or Dig). However, the situation for one-hit knockout moves is very different; the accuracy varies based on the difference between the user's level and the target's level.
Accuracy can be increased by Abilities, held items, and moves